Filmed in France, Israel, USA, Algeria, Argentina, Uruguay, South Africa and the UK, this disturbing and candid BBC documentary explores the history of modern interrogation techniques and the rise of modern torture using revealing interviews with state interrogators and state torturers.

The legacy of this history continues to shapes our present, especially in the United States, and some of these techniques have now become routine in the war on terror – be it the use of dogs, water-boarding, or sexual humiliation.

This long, unbroken line of inhuman cruelty connects Nazi Germany to Abu Ghraib, and is an essential issue in today’s political landscape.